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-rw-r--r--sysdeps/ieee754/drem.c107
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diff --git a/sysdeps/ieee754/drem.c b/sysdeps/ieee754/drem.c
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--- a/sysdeps/ieee754/drem.c
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-/* Copyright (C) 1992, 1995 Free Software Foundation, Inc.
-This file is part of the GNU C Library.
-
-The GNU C Library is free software; you can redistribute it and/or
-modify it under the terms of the GNU Library General Public License as
-published by the Free Software Foundation; either version 2 of the
-License, or (at your option) any later version.
-
-The GNU C Library is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-Library General Public License for more details.
-
-You should have received a copy of the GNU Library General Public
-License along with the GNU C Library; see the file COPYING.LIB. If
-not, write to the Free Software Foundation, Inc., 675 Mass Ave,
-Cambridge, MA 02139, USA. */
-
-/*
- * Copyright (c) 1985 Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms are permitted provided
- * that: (1) source distributions retain this entire copyright notice and
- * comment, and (2) distributions including binaries display the following
- * acknowledgement: ``This product includes software developed by the
- * University of California, Berkeley and its contributors'' in the
- * documentation or other materials provided with the distribution and in
- * all advertising materials mentioning features or use of this software.
- * Neither the name of the University nor the names of its contributors may
- * be used to endorse or promote products derived from this software without
- * specific prior written permission.
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
- */
-
-#include <ansidecl.h>
-#include <math.h>
-#include <float.h>
-#include "ieee754.h"
-
-/* Return the remainder of X/Y. */
-double
-DEFUN(__drem, (x, y),
- double x AND double y)
-{
- union ieee754_double ux, uy;
-
- ux.d = x;
- uy.d = y;
-#define x ux.d
-#define y uy.d
-
- uy.ieee.negative = 0;
-
- if (!__finite (x) || y == 0.0)
- return NAN;
- else if (__isnan (y))
- return y;
- else if (__isinf (y))
- return x;
- else if (uy.ieee.exponent <= 1)
- {
- /* Subnormal (or almost subnormal) Y value. */
- double b = __scalb (1.0, 54);
- y *= b;
- x = __drem (x, y);
- x *= b;
- return __drem (x, y) / b;
- }
- else if (y >= 1.7e308 / 2)
- {
- y /= 2;
- x /= 2;
- return __drem (x, y) * 2;
- }
- else
- {
- union ieee754_double a;
- double b;
- unsigned int negative = ux.ieee.negative;
- a.d = y + y;
- b = y / 2;
- ux.ieee.negative = 0;
- while (x > a.d)
- {
- unsigned short int k = ux.ieee.exponent - a.ieee.exponent;
- union ieee754_double tmp;
- tmp.d = a.d;
- tmp.ieee.exponent += k;
- if (x < tmp.d)
- --tmp.ieee.exponent;
- x -= tmp.d;
- }
- if (x > b)
- {
- x -= y;
- if (x >= b)
- x -= y;
- }
- ux.ieee.negative ^= negative;
- return x;
- }
-}
-
-weak_alias (__drem, drem)